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D2D relay power control method for maximizing traversal capacity

A power control and traversal capacity technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as the interference of the main network to the D2D link, achieve significant gains, ensure cellular user needs, and increase transmission rates. Effect

Pending Publication Date: 2022-04-15
JILIN UNIV
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Problems solved by technology

In current research, some scholars have proposed an energy-efficient power control algorithm for one-way relay communication; some scholars have studied the power allocation of two-way AF relay D2D communication, but did not consider the interference of the main network to the D2D link ; There are also studies considering the D2D system of DF relay, and deduce the ergodic capacity of the system, but for D2D and cellular users, the transmit power is considered to be equal, and the power control is only applicable to relay transmission

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  • D2D relay power control method for maximizing traversal capacity
  • D2D relay power control method for maximizing traversal capacity
  • D2D relay power control method for maximizing traversal capacity

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Embodiment

[0084] The noise of the D2D relay system is zero-mean additive white Gaussian noise with a spectral density of -174dBm / Hz; the channel gain from the transmitter to the receiver is where h represents the Rayleigh fading where the channel fading obeys the unit mean, and d i,j is the distance between transmitter i and receiver j, n is the path loss index;

[0085] A power control method that maximizes link traversal capacity in D2D relay system communication. There are three steps: establishing a D2D relay system model, analyzing and deriving the suboptimal solution of each part, and iteratively solving the optimal power. The specific steps as follows:

[0086] S1: Establish a D2D relay system model;

[0087] Establish an isolated cell scenario consisting of a pair of D2D users (DU1, DU2), a cellular user (CU) and a base station (BS); D2D users reuse the uplink frequency-time resources allocated to the CU for mutual communication; this Caused interference between the cellular...

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Abstract

The invention discloses a D2D relay power control method capable of maximizing traversal capacity. The D2D relay power control method comprises three steps of establishing a D2D relay system model, analyzing and deducing sub-optimal solutions of all parts, and iteratively solving optimal power. According to the invention, the traversal capacity of a D2D relay communication system is optimized, and the traversal capacity of a D2D link is maximized while the requirements of cellular users are ensured. Compared with non-relay half-duplex and full-duplex D2D communication, the D2D relay system has the advantage that the transmission rate of long-distance D2D communication is greatly improved. Meanwhile, compared with full-duplex D2D direct communication, even if the self-interference coefficient is higher than a certain threshold value, the D2D relay communication system can still provide remarkable gain, and the D2D relay communication system has a very wide prospect in the future.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically relates to a D2D relay power control method for maximizing ergodic capacity. Background technique [0002] At present, with the rapid development of wireless communication technologies, the number of terminal devices is increasing explosively, and at the same time, available spectrum resources are becoming less and less. Therefore, the user's increasing demand for wireless communication bandwidth and the limited wireless resource supply of the cellular network become the main contradiction. In the future, how to improve the utilization of limited spectrum is an important direction for the evolution of cellular networks, and improving the resource reuse of spectrum is the focus of cellular network research in recent years. Among them, D2D (Device-to-Device) technology improves spectrum resource utilization by multiplexing cellular network spectrum reso...

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Application Information

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IPC IPC(8): H04W52/24H04W52/46
Inventor 于银辉程国豪田子玉郭思宇
Owner JILIN UNIV
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